The Government has petitioned this Court for a writ of mandamus. However, the United States has an alternative means of review, that is, appeal from a final judgment under 28 U.S.C. § 1291. The challenge as to the district court's failure to impose a special mandatory parole term possesses the necessary characteristics of "independence and completeness" that are required for review under 28 U.S.C. § 1291 without regard to the limitations of 18 U.S.C. § 3731. Carroll v. United States, 354 U.S. 394, 406, 77 S.Ct. 1332, 1 L.Ed.2d 1442 (1957); United States v. Busic, 592 F.2d 13, 25-26, (2d Cir. 1978).